[en] Human beings have been facing numerous emergencies which could threaten their property or even their lives in all ages. In order to learn how people respond to the emergencies like earthquakes and fire disasters, a two-stage simulation considering people’s rational thinking and irrational thinking was conducted. Results show that people’s irrational thinking, like the herd effect, could exaggerate people’s behavior of conformity, and it changes the spatial features that stronger herd effect leads to higher cohesion level. It is also worth mentioning that crowd response of condition of smaller population is harder to predict because of its instability, and the response of the very first part of people who make decisions could make great changes to the whole crowd’s response. These results could give some enlightenment on the evacuation instruction during emergencies and future research works.

[en] Propagation and scattering for a time-harmonic electromagnetic plane wave obliquely incident upon a uniaxial bianisotropic half-space are considered. The approach is based on an identification of the downgoing and upgoing eigenmodes. The propagating eigenmodes are then used to calculate the reflection coefficients for TE and TM modes. The Brewster angles are analyzed and computed numerically. 23 refs., 3 figs

[en] The wear performance of graphite used in the high-temperature gas-cooled reactor (HTR-10) was researched. The wear mechanism, worn surface and wear debris were analyzed under SEM. Under test conditions, the wear rate was 2.27x10^-7 g/m for surface contact, and 1x10^-6 g/m level for line contact. The main wear mechanisms of graphite were groove and fatigue. The projected area of wear debris followed the logarithm normal school, giving most wear debris as a small sphere and large flake debris as only a small part.

[en] By viewing the operations of the Richardson purification algorithm as a discrete time dynamical process, we propose a method to overcome the instability of this eigenvector algorithm by controlling chaos. We present theoretical analysis and numerical results on the behavior and performance of the stabilized algorithm. copyright 1997 American Institute of Physics

[en] This paper presents a study on residual stress in cold drawn wire of low carbon steel by means of finite-element method (FEM) simulation and X-ray diffraction. A thick wire with a diameter of 17.9 mm drawn from an annealed wire with a diameter of 20.1 mm was investigated. First, FEM simulations were performed based on a suitable model describing the boundary conditions and the exact material behavior. Due to the initial texture in the original material, the anisotropy of the material plastic behavior was taken into account on the basis of the texture measurement of the wire. Instead of the isotropic von Mises yield criterion, a texture-based anisotropic yield locus was incorporated into the model to simulate the wire drawing process and calculate residual stresses. Next, X-ray diffraction measurements were carried out at the surface of the wire to obtain the distribution of the lattice spacing versus sin² ψ, from which the macroscopic residual stresses at the wire surface were calculated. The comparison between the results from the simulations and the measurements shows that a good agreement has been reached

[en] In this paper the ground and the excited states of a two-dimensional anyon system are studied via finite-size numerical calculations and single-mode approximation in a spherical geometry. It is shown that Laughlin's mean field theory gives an accurate description of the ground state properties. The authors find, consistent with earlier analytic theories, that the collective mode of the system exhibits a linear dispersion in the long wavelength limit, and predict a novel roton minimum at a finite value of the wavenumber q. The authors also discuss the consequences on the anyon spectrum of having a model repulsive interaction between the particles

[en] The spreading behavior of a liquid on the surface of a solid substrate is greatly changed by the presence of a molecular layer of organic material (a surfactant) on the liquid surface. In this work, we studied the spreading of water covered by a monolayer of valinomycin on a vertical glass slide, using an apparatus for Langmuir--Blodgett film deposition. The rate of spreading strongly depends on the surfactant concentration, and the spreading front is highly unstable: it bifurcates while spreading, forming tree-like patterns. copyright 1995 American Institute of Physics

[en] The time-domain inverse problem of determining the three-dimensional parameter functions for the biisotropic dispersive medium is considered. Maxwell close-quote s equations are rewritten in terms of the tangential fields. Time domain wave-splitting of Maxwell close-quote s equations is applied to the total field that is generated by a dipole exterior to the scattering medium. The structure of the electromagnetic fields is analyzed, and the transport equations are given. The reconstruction condition is derived for a layer-stripping approach. copyright 1997 American Institute of Physics

[en] Thermal cycling tests between 77 and 623 K were performed on Ti-6Al-4V alloy; the tensile properties were evaluated, and transmission electron microscopy (TEM) microstructural analysis was performed both before and after thermal cycling. Thermal cycling (1,000 cycles) promptly increases the strength of the as-quenched alloy, induces a slight decrease in strength for the near-peak-aged alloy, and makes no change for that of the overaged alloy. The elongation of the alloy in all heat-treated conditions decreases after 1,000 thermal cycles. The loss of fracture elongation of the as-quenched alloy is the largest, but the residual ductility is the highest. The loss of fracture elongation for the near-peak-aged alloy is lower, and the residual plasticity is higher than those for the overaged alloy

[en] A new Cu(II) complex with bi-[N-(propionic acid)] terephthalal diacythydrazon (H4L) was obtained by the reaction of CuCl 2H/sub 2/O and H/sub 4/ L in 1:1 pyridine and methanol. According to X-ray diffraction, the product was a binuclear complex, [Cu/sub 2/L(pyridine)6] 2H/sub 2/O. Each Cu(II) in the complex is six-coordinated by one N and two O atoms of H/sub 4/ L and three N atoms from pyridine. The coordination polyhedron around Cu(II) can be described as an octahedron with slightly distorted. In addition, antibacterial activities of the complex against coliform were investigated.The results showed that the inhibit rates of binuclear complex were 83% against coliform. (author)